Airbag control unit with part number 280797 0705PSA

What is the function of the airbag control unit 280797 0705PSA?

The airbag control unit 280797 0705PSA is the central control module for the occupant protection system in the Peugeot 406 Break I. It processes data from crash sensors and is responsible for precisely and promptly deploying the airbags and seatbelt pretensioners in the event of a collision, thereby protecting the vehicle’s occupants.

This specific control unit serves as the “brain” of the entire SRS (Supplemental Restraint System). It continuously monitors all connected components, including individual airbags, seatbelt pretensioners, and impact sensors.

Flawless communication and processing of sensor data are critical to the vehicle’s passive safety. If this module fails, the protective function of the entire restraint system can no longer be guaranteed.

What types of failures occur in the control unit 280797 0705PSA?

The most common faults of the control unit 280797 0705PSA are internal electronic malfunctions, recorded in the fault memory as “internal control unit error,” along with stored crash data following an accident. Communication issues with diagnostic tools or failures caused by voltage spikes and moisture are also typical for this model series.

A major cause of failure is the accumulation of crash data. Even minor collisions—such as rear-end impacts where the airbags do not deploy—can result in the control unit becoming internally locked. In such cases, the safety function remains permanently disabled until the data is professionally reset.

Additional defects arise directly on the circuit board. Faulty electronic components like resistors or capacitors, as well as cold solder joints, can lead to complete system failure. Common causes include aging, vibrations, or external factors such as water damage or overvoltage in the vehicle’s electrical system.

How can you recognize a fault in the control unit 280797 0705PSA?

A malfunction of the control unit 280797 0705PSA primarily manifests as a constantly illuminated or flashing airbag warning light (SRS warning lamp) in the instrument cluster. Often, the workshop can no longer establish communication with the control unit via the OBD2 interface, complicating diagnosis and indicating a serious internal fault.

The illuminated SRS warning light represents a clear safety risk. It signals that the entire airbag system is deactivated and would fail to deploy in the event of a crash. Ignoring this symptom endangers the safety of all vehicle occupants.

In the workshop, when reading the fault memory, the error code “internal control unit error” or messages such as “supply voltage too low” frequently appear. These entries typically confirm a hardware-level defect within the module.

In which vehicles is the control unit 280797 0705PSA installed?

The airbag control unit with part number 280797 0705PSA is specifically designed for various first-generation Peugeot 406 variants, including the Peugeot 406 Break I (station wagon), the sedan, and the Coupé I. At Airbag24, we professionally repair this control unit for the aforementioned models.

Accurate assignment to the correct vehicle is crucial for proper operation. At Airbag24, the control unit 280797 0705PSA is refurbished for the following models:

Peugeot 406 Break I (1995–2003), including the facelifted version (1999–2005)

Peugeot 406 Sedan I (1995–2003), including the facelifted version (1999–2005)

Peugeot 406 Coupé I (1997–2003), including the facelifted version (1999–2005)

How does the repair of the control unit 280797 0705PSA proceed?

The repair of the control unit 280797 0705PSA at Airbag24 involves a systematic analysis at the component level, deletion of crash data, and replacement of defective electronic parts. After submission, the unit is inspected, repaired, and subjected to a final functional test to restore full operability.

Before removal, it is ideal to read out the fault memory and document any error codes. Upon sending the unit to Airbag24, a detailed diagnosis is performed on the circuit board. Technicians identify the source of the problem—whether it’s a faulty memory chip, a power supply issue, or a damaged trace.

Stored crash data is erased at the hardware level. Defective components are replaced with new, high-quality parts, and solder joints are professionally reworked if necessary.

Finally, the control unit undergoes testing on a bench to ensure flawless communication and proper execution of all functions. We provide a 12-month warranty on every repair.

What shipping options does Airbag24 offer?

To send us your defective control unit, you can either ship it to us yourself at no cost or arrange a convenient UPS pickup at your preferred location. For the return shipment, we also provide flexible options, including free standard UPS shipping, faster UPS Express shipping, and the choice of cash-on-delivery or self-collection.

For sending your removed control unit to us, you have two options: you can either mail it back yourself free of charge or use our convenient UPS pickup service.

Once the repair is complete, several return shipping options are available:

Standard UPS shipping is free for you and typically takes 1–3 business days.

For faster delivery, you can opt for UPS Express shipping (1–2 business days).

Both standard and express shipping are also available with cash-on-delivery.

Alternatively, you can pick up the repaired control unit directly from our premises.